摘要:
A hitch control system for a work vehicle combines a front suspension position signal, a hitch load signal and a hitch position signal to generate a valve command signal that controls the hitch position so as to alleviate pitching and maximize front wheel ground contact time.
摘要:
Means to enable an elongate boom (1) to maintain a constant attitude with respect to the ground, e.g. the boom of an agricultural spray apparatus comprising a carrier (12) on which the boom (1) is pivotally mounted for movement about a substantially horizontal axis (P1), a levelling member (3) pivotally mounted on the boom for movement about a substantially horizontal axis (P2) and linkage means (6) pivotally connected between the levelling member (3) and the carrier (12), the pivotal connections being disposed to cause the boom (1) to rotate at a desired angular velocity in response to rotation of the carrier (12).
摘要:
The invention realizes a device for the variation of the weight distribution on the supports of self-propelled operating machines, especially for road works including at least one couple of hydraulic cylinders (7,8) relative to the back (3,4) or front (2,3) supports. Said cylinders are double-acting and each one has a first chamber (71,81) connected hydraulically to the corresponding chambers of the other homologous support. The second chamber (72,82) of said cylinder is selectively connected through at least one electrovalve (12) to a external source (9) of hydraulic pressure such that the reaction thrust furnished by the respective hydraulic piston (73,83) is proportional to the difference between the pressures of said first and of said second chamber, the difference of the reaction force between said cylinders realizing the modification of the supporting triangle of the operating machine.
摘要:
The invention realizes a device for the variation of the weight distribution on the supports of self-propelled operating machines, especially for road works including at least one couple of hydraulic cylinders (7,8) relative to the back (3,4) or front (2,3) supports. Said cylinders are double-acting and each one has a first chamber (71,81) connected hydraulically to the corresponding chambers of the other homologous support. The second chamber (72,82) of said cylinder is selectively connected through at least one electrovalve (12) to a external source (9) of hydraulic pressure such that the reaction thrust furnished by the respective hydraulic piston (73,83) is proportional to the difference between the pressures of said first and of said second chamber, the difference of the reaction force between said cylinders realizing the modification of the supporting triangle of the operating machine.
摘要:
Un véhicule de support, en l'occurrence un tracteur (16) porte un cadre principal fixe (8) sur lequel est agencé un cadre intermédiaire (7) dont la hauteur peut être réglée par un vérin (10) et qui soutient au-dessus de deux vérins hydrauliques (121) symétriques par rapport à leur articulation commune (13) une poutre-console (5) sur laquelle sont agencés, près de ses deux extrémités, deux dispositifs capteurs (26) ayant chacun deux contacts capteurs (21-24) décalés en hauteur. Sur la poutre-console (5) est également agencé un dispositif vaporisateur (6) avec une rangée d'ajutages (9) qui vaporisent un fluide de traitement. Chaque paire de contacts capteurs (par exemple 23, 24, 211, 212), sert à déterminer la hauteur (c) de la poutre-console (5), donc desdits ajutages (9), au-dessus du sol (1) ou la surface enveloppante (4) des cultures agricoles (3). Le courant de mesure qui traverse les plantes et pénètre dans le sol provient de la batterie (18) du véhicule, dont le pôle négatif est mis à la terre, alors que le pôle positif est relié par l'unité de commande (32) aux contacts capteurs, reliés par des circuits de courant de perte aux pneus (19). Plus la distance (b) par rapport aux cultures agricoles (3) est maintenue avec précision, plus les opérations de pulvérisation sont uniformes et efficaces.
摘要:
A suspension to carry a boom on a vehicle such as a tractor and support agricultural spray heads. The suspension includes passive elements to maintain the boom in set relation to the vehicle. The suspension also includes an active part which can act to alter a dimension of the passive suspension. A control circuit for the active part derives information from sensors of the height of the boom above the ground and forces the alteration of the dimension to maintain a substantially uniform and constant height for the boom. The active part operates for lower frequencies than the passive part so that when the vehicle tilts, for example on its suspension on uneven ground, the relation set by the passive part is altered to maintain the desired height while the passive part is still effective at the higher frequencies to stabilise the boom.
摘要:
Die Erfundung betrifft eine Anordnung mit einem an einem Fahrzeug pendelnd aufgehängten, querzur Fahrtrichtung sich erstreckenden Verteil- oder Sprüheinrichtung zum Aufbringen von Pflanzenschutz- bzw. Düngemitteln. Im Betrieb soll der entsprechende Spritzrahmen (18) parallel zum Erdoboden verlaufen. Um eine Anpassung an unterschiedliche Verteil- oder Sprühbreiten zu erhalten ist jede Seite (links oder rechts) des Spritzrahmens (18) für sich ganz oder teilweise ein- oder wieder ausklappbar. lm falle, daß hierbei ein Ungleichgewicht der einen Seite des Spritzrahmens gegenüber dessen anderen Seite eintritt ist eine Sperrvorrichtung zum Arretieren (Blockieren) der pendelnden Aufhängung des Spritzrahmens in jeder Spritzhöhenlage vorgesehen.
摘要:
A suspension to carry a boom on a vehicle such as a tractor and support agricultural spray heads. The suspension includes passive elements to maintain the boom in set relation to the vehicle. The suspension also includes an active part which can act to alter a dimension of the passive suspension. A control circuit for the active part derives information from sensors of the height of the boom above the ground and forces the alteration of the dimension to maintain a substantially uniform and constant height for the boom. The active part operates for lower frequencies than the passive part so that when the vehicle tilts, for example on its suspension on uneven ground, the relation set by the passive part is altered to maintain the desired height while the passive part is still effective at the higher frequencies to stabilise the boom.